Origin of the sudbury complex by meteoritic impact: neodymium isotopic evidence.
نویسندگان
چکیده
Samarium-neodymium isotopic data on whole rocks and minerals of the Sudbury Complex in Canada gave an igneous crystallization age of 1840 +/- 21 x 10(6) years. The initial epsilon neodymium values for 15 whole rocks are similar to those for average upper continental crust, falling on the crustal trend of neodymium isotopic evolution as defined by shales. The rare earth element concentration patterns of Sudbury rocks are also similar to upper crustal averages. These data suggest that the Sudbury Complex formed from melts generated in the upper crust and are consistent with a meteoritic impact.
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ورودعنوان ژورنال:
- Science
دوره 230 4724 شماره
صفحات -
تاریخ انتشار 1985